VERFAHREN ZUR HERSTELLUNG A-SUBSTITUIERTER CARBONSÄUREN AUS DER REIHE DER A-HYDROXYCARBONSÄUREN UND N-SUBSTITUIERTEN A-AMINOCARBONSÄUREN

A process for the preparation of alpha-substituted carboxylic acids from the series including alpha-hydroxycarboxylic acids and N-substituted-alpha-aminocarboxylic acids by cathodic carboxylation with carbon dioxide of a compound corresponding to the general formula R1-C(-X)R2 which is constituted b...

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Bibliographic Details
Main Authors HATELEY, MARTIN, LEHMANN, THOMAS, BILZ, JUERGEN, REUFER, CHRISTIAN, WECKBECKER, CHRISTOPH, SANZENBACHER, RAINER
Format Patent
LanguageGerman
Published 11.10.2007
Subjects
APPARATUS THEREFOR
CHEMISTRY
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS
METALLURGY
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Summary:A process for the preparation of alpha-substituted carboxylic acids from the series including alpha-hydroxycarboxylic acids and N-substituted-alpha-aminocarboxylic acids by cathodic carboxylation with carbon dioxide of a compound corresponding to the general formula R1-C(-X)R2 which is constituted by aldehydes, ketones or N-substituted imines. In the past, that carboxylation has taken place in an undivided electrolytic cell with the use of a sacrificial anode. As described herein, the carboxylation takes place in the absence of a sacrificial anode in an electrolytic cell divided by a separator, at a diamond film cathode. The anode is formed of a material which is stable under electrolytic conditions; in particular, it is a diamond film electrode. The catholyte includes an organic solvent and a conducting salt.
Bibliography:Application Number: DE20046001782T